Going out to work may not increase conjugal unhappiness, but it certainly gives wives an easier way out.

ECONOMIST: I do, I can, I will

As much as it may have evolved, in the human animal, as a motivation system for mate-finding, it was rarely given great consideration in the final reckoning of conjugal choice.

NEWYORKER: Looking for Someone

It was not until 40, 000 years ago that they began to re-establish conjugal relations, possibly as a result of the technological revolution of the Late Stone Age, which yielded new and more finely crafted tools.

ECONOMIST: Human evolution: Before the exodus | The